Recent content by 3l33ter

I have been using wd-40 with the tap from the beginning. I would rock it back and forth, yes. I have already ordered the Snap-On chasing tap, I'm just waiting for it to arrive. rsanter - Yeah, maybe that's what happened to my HF tap. It probably dulled or whatever and became ineffective. OK...

I checked the head bolts with a thread checking tool to confirm that they're M12 x 1.5. Then I double checked the M12 x 1.5 tap against a head bolt by putting their threads into each other and they lined up perfectly. When I say it went in super hard, I mean it took both hands to turn the tap...

What size bore brush do you think is good for an M12 hole? 1/2"? I'd rather not buy a whole set of bore brushes in different sizes, I just want the size that I need. But I can't seem to find them in singles except for 3/8" and 5/8", or smaller sizes for gun barrels.

I have tapped several holes before, and my day job involves drilling aluminum and lots of self tapping screws. I enjoy working with metal and fabricating, but I'm definitely more of a mechanic than a machinist. It doesn't feel like I'm crossthreading the tap, but the tap would go in super hard...

Nice idea! Did you sharpen the edge of the HSS?

I'm working on my 1977 Mercedes 6.9. This thing has an iron block, and I took the heads off a couple of years ago and had to let it sit all this time. I started working on it again recently and I noticed that the head bolts holes had gotten kind of rusty. The head bolt holes are M12 x 1.5, and...